<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>WebSocket客户端</title>
</head>
<body>


<script type="text/javascript">
    var socket;
    if (window.WebSocket) {
        socket = new WebSocket("ws://localhost:8899/ws");
        socket.onmessage = function (ev) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" + ev.data;
        }
        socket.onopen = function (ev) {
            var ta = document.getElementById("responseText");
            ta.value = "连接开启！";
        }
        socket.onclose = function (ev) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" + "连接关闭！"
        }
    } else {
        alert("浏览器不支持 WebSocket")
    }

    function send(message) {
        if (!window.WebSocket) {
            return;
        }

        if (socket.readyState == WebSocket.OPEN) {
            socket.send(message);
        } else {
            alert("连接尚未开启！")
        }
    }
</script>
<form action="return false;">

    <textarea name="message" id="message" cols="30" rows="10"></textarea>
    <input type="button" value="发送数据" onclick="send(this.form.message.value)"/>

    <h3>服务端输出</h3>

    <textarea name="responseText" id="responseText" cols="30" rows="10"></textarea>
    <input type="button" value="清空内容" onclick="javascript: document.getElementById(' responseText').value=''"/>

</form>
</body>
</html>